Question 22

Find the perimeter (in cm) of a semicircle of radius 28 cm.

Solution

Radius of semi circle = $$r=28$$ cm

=> Perimeter of semi circle = $$\pi r+2r$$

= $$(\frac{22}{7}\times28)+(2\times28)$$

= $$88+56=144$$ cm

=> Ans - (B)

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